2004 YAMAHA YZ85 warning

3 - 16
INSP
ADJ
CHASSIS/BRAKE SYSTEM AIR BLEEDING
EC360000
CHASSIS
EC361012
BRAKE SYSTEM AIR BLEEDING
WARNING
Bleed the brake system if:

The system has been disassembled.

A brake hose has been loosened or
removed.

The brake fluid is very low.

The brake operation is faulty.
A dangerous loss of braking performance
may occur if the brake system is not prop-
erly bled.
1. Remove:

Reservoir cap

Diaphragm

Reservoir float (front brake)
2. Bleed:

Brake fluid
ÈFront
ÉRear
Air bleeding steps:
a. Add proper brake fluid to the reservoir.
b. Install the diaphragm. Be careful not to
spill any fluid or allow the reservoir to
overflow.
c. Connect the clear plastic tube 2 tightly to
the caliper bleed screw 1.
d. Place the other end of the tube into a con-
tainer.
e. Slowly apply the brake lever or pedal sev-
eral times.
f. Pull the lever in or push down on the
pedal. Hold the lever or pedal in position.
g. Loosen the bleed screw and allow the
lever or pedal to travel towards its limit.
h. Tighten the bleed screw when the lever or
pedal limit has been reached; then
release the lever or pedal.
T R..
Bleed screw:
6 Nm (0.6 m  kg, 4.3 ft  lb)
i. Repeat steps (e) to (h) until of the air bub-
bles have been removed from the system.
È
5PA30290
É
5PA30300

3 - 17
INSP
ADJ
FRONT BRAKE ADJUSTMENT
3. Install:

Reservoir float (front brake)

Diaphragm

Reservoir cap NOTE:
If bleeding is difficult, it may be necessary to
let the brake fluid system stabilize for a few
hours. Repeat the bleeding procedure when
the tiny bubbles in the system have disap-
peared.
j. Add brake fluid to the level line on the res-
ervoir.
WARNING
Check the operation of the brake after
bleeding the brake system.
EC362040
FRONT BRAKE ADJUSTMENT
1. Check:

Brake lever position a
2. Remove:

Lever cover
3. Adjust:

Brake lever position
4. Install:

Lever cover
Standard brake lever position:
95 mm (3.74 in)
Extent of adjustment:
76 ~ 97 mm (2.99 ~ 3.82 in)
Brake lever position adjustment steps:

Loosen the locknut 1.

Turn the adjusting bolt 2 until the lever
position a is within specified position.

Tighten the locknut.
T R..
Locknut:
5 Nm (0.5 m  kg, 3.6 ft  lb)
CAUTION:
Be sure to tighten the locknut, as it will
cause poor brake performance.
5PA30310
5PA30320

3 - 18
INSP
ADJREAR BRAKE ADJUSTMENT/
FRONT BRAKE PAD INSPECTION AND REPLACEMENT
EC364002
REAR BRAKE ADJUSTMENT
1. Check:

Brake pedal height a
Out of specification → Adjust.
Brake pedal height
a:
4 ~ 10 mm (0.16 ~ 0.39 in)
5PA30330
2. Adjust:

Brake pedal height
Pedal height adjustment steps:

Loosen the locknut 1.

Turn the adjusting nut 2 until the pedal
height a is within specified height.

Tighten the locknut.
WARNING

Adjust the pedal height between the
maximum
È and the minimum
É as
shown. (In this adjustment, the bolt
3
end
b should protrude out of the lower
adjusting nut
4 but not be less than
2 mm (0.08 in)
c away from the brake
pedal
5).

After the pedal height adjustment, make
sure that the rear brake does not drag.
5PA30340
ÈÉ
5PA30350
FRONT BRAKE PAD INSPECTION AND
REPLACEMENT
1. Remove:

Rubber cap
2. Inspect:

Brake pad thickness a
Out of limit → Replace as a set.
Brake pad thickness:
4.0 mm (0.16 in)
: 0.8 mm (0.03 in)5PA30360

3 - 21
INSP
ADJ
BRAKE FLUID LEVEL INSPECTION
3. Inspect:

Brake fluid level
Refer to “BRAKE FLUID LEVEL INSPEC-
TION” section.
4. Check:

Brake pedal operation
A softy or spongy feeling → Bleed brake
system.
Refer to “BRAKE SYSTEM AIR BLEED-
ING” section.
BRAKE FLUID LEVEL INSPECTION
1. Place the brake master cylinder (reservoir
tank) so that its top is in a horizontal posi-
tion.
2. Inspect:

Brake fluid level
Fluid at lower level a → Fill up.
ÈFront
ÉRear
WARNING

Use only designated quality brake fluid to
avoid poor brake performance.

Refill with same type and brand of brake
fluid; mixing fluids could result in poor
brake performance.

Be sure that water or other contaminants
do not enter master cylinder when refill-
ing.

Clean up spilled fluid immediately to
avoid erosion of painted surfaces or plas-
tic parts.

Install the brake caliper 0 and tighten the
pad pins A.
T R..
Bolt (brake caliper):
23 Nm (2.3 m  kg, 17 ft  lb)
Pad pin:
18 Nm (1.8 m  kg, 13 ft  lb)
NOTE:
Apply the LOCTITE® on the bolt (brake cali-
per rear side).
Recommended brake fluid:
DOT #4
5PA30460
È
5PA30470
É

3 - 26
INSP
ADJFRONT FORK COMPRESSION DAMPING FORCE
ADJUSTMENT

STANDARD POSITION:
This is the position which is back by the spe-
cific number of clicks from the fully turned-in
position.
CAUTION:
Do not force the adjuster past the minimum
or maximum extent of adjustment. The
adjuster may be damaged.
WARNING
Always adjust each front fork to the same
setting. Uneven adjustment can cause poor
handling and loss of stability.
Extent of adjustment
Maximum Minimum
Fully turned in
position20 clicks out (from
maximum position)
Standard position:
7 clicks out
EC36J001
FRONT FORK COMPRESSION DAMPING
FORCE ADJUSTMENT
1. Remove:

Rubber cap
2. Adjust:

Compression damping force
By turning the adjuster 1.
Stiffer
a
→ Increase the compression
damping force. (Turn the adjuster
1
in.)
Softer
b
→ Decrease the compression
damping force. (Turn the adjuster
1
out.)
5PA30610

3 - 27
INSP
ADJ
REAR SHOCK ABSORBER INSPECTION

STANDARD POSITION:
This is the position which is back by the spe-
cific number of clicks from the fully turned-in
position.
CAUTION:
Do not force the adjuster past the minimum
or maximum extent of adjustment. The
adjuster may be damaged.
WARNING
Always adjust each front fork to the same
setting. Uneven adjustment can cause poor
handling and loss of stability.
3. Install:

Rubber cap
Extent of adjustment
Maximum Minimum
Fully turned in
position20 clicks out (from
maximum position)
Standard position:
YZ85: 10 clicks out
YZ85LW: 9 clicks out
EC36K000
REAR SHOCK ABSORBER INSPECTION
1. Inspect:

Swingarm smooth action
Abnormal noise/unsmooth action →
Grease the pivoting points or repair the piv-
oting points.
Damage/oil leakage → Replace.
5PA30620

3 - 33
INSP
ADJ
STEERING HEAD INSPECTION AND ADJUSTMENT
4. Adjust:

Steering ring nut
Steering ring nut adjustment steps:

Remove the number plate.

Remove the handlebar and handlebar
upper bracket.

Loosen the steering ring nut 1 using the
steering nut wrench 2.
Steering nut wrench:
YU-33975/90890-01403

Tighten the steering ring nut 3 using
steering nut wrench 4.
NOTE:

Install the steering ring nut with its larger
chamfered side a downward.

Set the torque wrench to the steering nut
wrench so that they form a right angle.
Steering nut wrench:
YU-33975/90890-01403
T R..
Steering ring nut (initial tighten-
ing):
38 Nm (3.8 m  kg, 27 ft  lb)

Loosen the steering ring nut one turn.

Retighten the steering ring nut using the
steering nut wrench.
WARNING
Avoid over-tightening.
T R..
Steering ring nut (final tighten-
ing):
4 Nm (0.4 m  kg, 2.9 ft  lb)
5PA30740
5PA30740

4 - 4
ENGRADIATOR
EC456000
HANDLING NOTE
WARNING
Do not remove the radiator cap when the
engine and radiator are hot. Scalding hot
fluid and steam may be blown out under
pressure, which could cause serious
injury.
When the engine has cooled, open the radi-
ator cap by the following procedure:
Place a thick rag, like a towel, over the radi-
ator cap, slowly rotate the cap counter-
clockwise to the detent. This procedure
allows any residual pressure to escape.
When the hissing sound has stopped,
press down on the cap while turning coun-
terclockwise and remove it.
EC454000
INSPECTION
Radiator
1. Inspect:

Radiator core 1
Obstruction → Blow out with compressed
air through rear of the radiator.
Bent fin → Repair or replace.
5PA40040
EC455000
ASSEMBLY AND INSTALLATION
Radiator
1. Install:

Radiator breather hose 1
To radiator 2.
5PA40050
2. Install:

Radiator 1

Bolt (radiator) 2
5PA40060